Wrench



May 31, 1932. c. L. MAGUIRE WRENCH Filed Dec. 13, 1930 INVENTOR CunmcsL. Mqsunz:

DY W

Patented May 31, 1932 nmreo STATES me. v

SCHNEIDER, OF YREKA,CAI:IFOBNIA' s T WRENCH Application filed December13,19302? Seria1No.*502;O84l

This invention relates to a wrench, the prime object of which is toprovide a novel structure whereby a quick adjustment of the jaws of thewrench is accomplished.

' Another object is to provide a wrench in which the movablejaw isrigidly held in adjusted position, and in which all strain is relievedon the adjusting rotor.

A further object is to provide a novel locking device to retain theadjusted position of the jaws.

Still another object is to provide a novel means for preventing thespreading of the sides of the movable aw.

Other objects, advantages, and features of invention may appear from theaccompanying drawings, the subj oined detailed description, and theappended claims.

In the drawings Figure 1 is a fragmentary, side elevation of my wrench.

Figure 2 is a fragmentary, sectional view taken on line 2-2 of Figure 1.

Figure 3 is a side elevation of the lock.

Figure 4 is a fragmentary, perspective view of the stationary jaw andracks.

Referring more particularly to the drawings, the numerall'indicates awrench inc'iuding a handle 2 and a head 3. On the head 3 is provided astationary jaw 4 and also on each side of the head a pair oftransversely extending racks 5-6 are integrally formed. The lowersurfaces of the racks 5-6 are bevelled upwardly and inwardly as shown at78 respectively. The purpose of this construction is to prevent sidespreading of the sidesof the movable jaw, as will be further described.

A movable jaw 9 is slidably mounted on the head 3 and is adjustedtransversely on the head by means of the rack 5, as follows: A gearedrotor 10 is j ournaled in the jaw 9 and engages the rack 5. Thus byrotating the rotor, the jaw my be adjusted as desired.

A difiiculty in wrenches heretofore in use has been the tendency to workout of adjustment as the wrench is used, due to the fact that the strainof the work is pressed against the rotor and the rack. To obviate thisdiffi- 50 culty, I provide a locking roller 11 which is journaled in thejaw9. This roller is provided with teeth 12which engage the rack 6.During the adjustment of the jaw 9, the roller 11 is rotated downwardly,thus moving its teeth out of engagement with the rack 6. lVhen the jawhas been moved to the desired point, the roller is rotated so that itsteeth engage the rack 6 and thus hold the jaw securely in position. Theteeth 12 mesh accurately with the rack 6 and bind somewhat so that thestrain is carried by the locking roller.

With this arrangement, the teeth on the locking side can be meshed moreclosely than is the case on the adjusting side. A certain amount ofmovement must be allowed between the adjusting rotor and its rack so asto provide free and easy movement. The jaw 9 bears upon plane surfaces1313 on the head, thus providing a rest for the movable jaw and enablingit to move back and forth more easily.

Having described my invention, I claim:

1. A wrench comprising a handle, a head on the handle, a stationary jawon the head, a pair of racks on said head, one on either side thereof, amovable jaw, an adjusting rotor journaled in the movable jawand engagingone of the racks, and lockingmeans in the jaw engaging the second rack,the lower surfaces of said racks being bevelled inwardly and'upwardly,said movable jaw fitting against said tapered surfaces whereby the jawis held against side spreading, a pair of transversely extending planesurfaces on the head,,said movable jaw resting on said plane surfaces.

2. A wrench comprising a handle, a head on the handle, a stationary jawon the head, a pair of racks on said head, one on either side thereof, amovable jaw, an adjusting motor journaledin the movable jaw andengagingone of the racks, a locking roller journaled in the movable jaw, teethon one side of the locking roller, said teeth engaging the second rackwhereby the aw is locked against movement.

3. A wrench comprisin a handle, a head on the handle, a stationary jawon the head, a pair of racks on said head, one on either side thereof, amovable jaw, an adjusting rotor journaled in the movable jaw andengaging one of the racks, a locking roller journaled in the movablejaw, teeth on the locking roller, said teeth engaging the second rackwhereby the jaw is locked against movement, the lower surfaces of saidracks being bevelled inwardly and upwardly, said movable jaw fittingagainst said tapered surfaces whereby the Jaw is held against the sidespreading, a pair of transversely extending plane surfaces on the head,said movable jaw resting on said plane surfaces.

In testimony whereof, I aflix my signature.

CHARLES L. MAGUIRE.

